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Internet Explorer 7 includes many changes to the user interface, but it is possible to change certain things back.

Display the menu-bar at the top:

Can be shown temporarily by holding down the ALT key.

1. Click the Tools-menu (Right of the Tab-bar) and check "Menu bar"
2. Place the menu-bar above the address-bar with this registry key:

   [HKEY_CURRENT_USER \Software \Microsoft \Internet Explorer \Toolbar \WebBrowser]
   ITBar7Position = 1
   
   More Info MS KB 930645

Remove the search-bar:

[HKEY_CURRENT_USER \Software \Policies \Microsoft \Internet Explorer \InfoDelivery \Restrictions]
NoSearchBox = 1

Remove the command-bar shortcuts:

[HKEY_CURRENT_USER \Software \Microsoft \Internet Explorer \CommandBar]
Enabled = 0

Remove the command-bar entirely:

Will disable Favorites, Feeds and History.

[HKEY_CURRENT_USER \Software \Policies \Microsoft \Internet Explorer \Toolbars \Restrictions]
NoCommandBar = 1

Credits Winhelponline.com